What color is #39307F?

#39307F is a dark indigo. In RGB it is rgb(57, 48, 127), and in HSL hsl(247, 45%, 34%).

Is #39307F accessible as text?

On white, #39307F has a contrast ratio of 11.03:1 (passes WCAG AA for body text); on black it is 1.90:1 (fails). For text placed on #39307F, use white for the best readability.

What is the closest Tailwind color to #39307F?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #39307F?

#39307F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #757E30. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #39307F below.

Is #39307F good for buttons?

#39307F works well for buttons and highlights, but use white text on #39307F — black text only reaches 1.90:1, below the 4.5:1 needed for normal-size labels.

Is #39307F the same as CSS darkslateblue?

No — #39307F is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#39307F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #39307F

Not just a swatch — here's how #39307F works with other colors. Named schemes with #39307F in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #39307F Anchor #141210 Accent #DB9758 Secondary #272833 Surface #F3ECE3

Dark Slate Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #39307F Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #291244

Dark Slate Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Dark Slate Blue.

Coastal Morning Lead · 5 colors

Lead #39307F Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

Dark Slate Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Vintage Leather Lead · 5 colors

Lead #39307F Secondary #7F4533 Surface #EDD7C2 Accent #365247 Anchor #582238

Dark Slate Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #39307F Secondary #61627F Support #9D9088 Ink #18140F

Dark Slate Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Dark Slate Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #39307F actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 27/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 64/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 50/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 63/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 22/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #39307F

For UI

For branding

For interior

For fashion

People also use #39307F with

Lapis Lazuli Eminence Olive Green Gainsboro Prussian Blue

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 11.0:1. Use

Subtle surface Use #D5D2E8 for cards and hover fills. Tint 80

Avoid beside #53307E — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #39307F at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #39307F;
  --color-base-rgb: 57 48 127;
  --color-base-oklch: oklch(36.7% 0.128 283.2);
  --color-50: #F4F4FB;
  --color-100: #E3E1F4;
  --color-200: #C8C4E8;
  --color-300: #A19BD5;
  --color-400: #7C74BE;
  --color-500: #5C53A2;
  --color-600: #4B457D;
  --color-700: #39355A;
  --color-800: #28263B;
  --color-900: #1A1925;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F4F4FB',
    100: '#E3E1F4',
    200: '#C8C4E8',
    300: '#A19BD5',
    400: '#7C74BE',
    500: '#5C53A2',
    600: '#4B457D',
    700: '#39355A',
    800: '#28263B',
    900: '#1A1925',
  },
}

$base: #39307F;
$base-ink: #FFFFFF;
$base-50: #F4F4FB;
$base-100: #E3E1F4;
$base-200: #C8C4E8;
$base-300: #A19BD5;
$base-400: #7C74BE;
$base-500: #5C53A2;
$base-600: #4B457D;
$base-700: #39355A;
$base-800: #28263B;
$base-900: #1A1925;
$base-hover: #2D2665;
$base-subtle: #BFBBDE;

{
    "color": {
        "base": {
            "value": "#39307F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F4FB",
                "type": "color"
            },
            "100": {
                "value": "#E3E1F4",
                "type": "color"
            },
            "200": {
                "value": "#C8C4E8",
                "type": "color"
            },
            "300": {
                "value": "#A19BD5",
                "type": "color"
            },
            "400": {
                "value": "#7C74BE",
                "type": "color"
            },
            "500": {
                "value": "#5C53A2",
                "type": "color"
            },
            "600": {
                "value": "#4B457D",
                "type": "color"
            },
            "700": {
                "value": "#39355A",
                "type": "color"
            },
            "800": {
                "value": "#28263B",
                "type": "color"
            },
            "900": {
                "value": "#1A1925",
                "type": "color"
            }
        }
    }
}

Palettes built on #39307F

Color Lab

Pairs with #39307F

UI roles & guardrails

In real applications

Scales

Every model

Export